1670216 has 16 divisors (see below), whose sum is σ = 3316140. Its totient is φ = 785920.

The previous prime is 1670213. The next prime is 1670269. The reversal of 1670216 is 6120761.

It can be written as a sum of positive squares in 2 ways, for example, as 1464100 + 206116 = 1210^2 + 454^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1670191 and 1670200.

It is not an unprimeable number, because it can be changed into a prime (1670213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6005 + ... + 6276.

2^1670216 is an apocalyptic number.

It is an amenable number.

1670216 is a deficient number, since it is larger than the sum of its proper divisors (1645924).

1670216 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 8 representation: 1670216 = (6276110)₈.

1670216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12304 (or 12300 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1670216 is about 1292.3683685389. The cubic root of 1670216 is about 118.6472144748.

Adding to 1670216 its reverse (6120761), we get a palindrome (7790977).

The spelling of 1670216 in words is "one million, six hundred seventy thousand, two hundred sixteen".